One of the benefits of the double shipping is that there's a lot of velocity - even a series that lasts a year gets 24 issues.
With the upcoming Titans/Teen Titans Judas Contract Redux crossover, seems pretty assured the book will get a little boost and end up with at least 24-30 issues, which is a respectable run.
I'll hope for more, of course.
Priest's writing here is meticulous in a way that would well suit a more traditional Detective Comics, I think. If/when the current Bat-X-Men direction ends, he'd be a great choice.